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As an absolute 100% no-other-choice-last-resort-effort, I am willing to format and reinstall Windows, but I'd prefer to figure out how to fix this problem without having to do so. That way, I'll be able to install SP1 onto customers computers where I do not have the option of performing a format.

I guess it's just my (good?) luck that this has happened to me first, before I need to deal with customers. Untill the problem is resolved, I'll not be installing SP1 for customers.

EDIT: For the record, my Windows 7 Ultimate x64 is legal, and has been validated:

Have you made any full system images and restored any to the drive? When wondering why neither the beta or RC would finish on the 64bit while a fast temp install of the 32bit would see them go on the one difference was having created and restored images where the SP installer is unable to access the primary.

When seeing the eror screen click on the link shown for the MS page since the solution information has been updated for the rtm release on different options. All the updates and readiness tool were on here but each attempt fiailed until the rtm stalled instead where new info was then seen. "mountvol /E" entered at the elevated command prompt followed by a full restart took care of that fast!

Update KB2726535(x64), Error 0x80070490For a few days I am trying to install the update KB2726535;
I always get the Error 0x80070490.
Tried everything to fix it, but nothing worked.
You are my last hope!
Thank you for helping me,
2press

Windows Updates & Activation

FAILURE TO CONFIGURE WINDOWS 7 SERVICE PACK 1 x-64: Error 0x80070490This has been an ongoing issue since my first attempt to configure it on 24 June 2011:
It always reboots @ 10% during the configuration; restarts @ 7% configuring, then fails completely @ 10%.
Error: ERROR_NOT_FOUND(0x80070490)
STEP 1:
Before attempting any fixes, this was the result after...

Windows Updates & Activation

How to fix error 0x80070490 so windows 7 sp1 will installHave tried for several days to install SP1 on Windows 7 Ultimate. Ran/installed System update readiness tool, ran the CSC log, ran the windows update troubleshooter and still no luck. Last update received was at 8:42 pm (PST) for KB978821. Please help if you can.

Installation & Setup

Cannot Install Win 7 over XP Home~ERROR Code: 0x80070490Greetings Friends.
I have an unfortunate problem with Windows 7. I purchased it for installation on a PC on which I've long been happily running XP; it was time to update. The new Win 7 installed beautifully on my lapotp with Vista on-board.
Here is what occurs: the first language I get...

Installation & Setup

Windows Backup error: "Element not found. (0x80070490)"Hi everyone
When trying to run a backup through the Windows Backup & Restore interface, I get this error:
My backup is setup specifically to run on demand, and I have disabled the option of automatic backups. This error pops up EVERY time I try to run a backup, it's not just a one-off. However,...